Wadena -- U.S. County in Minnesota Population (2000): 13713 Housing Units (2000): 6334 Land area (2000): 535.016559 sq. miles (1385.686467 sq. km) Water area (2000): 7.979965 sq. miles (20.668013 sq. km) Total area (2000): 542.996524 sq. miles (1406.354480 sq. km) Located within: Minnesota (MN), FIPS 27 Location: 46.543768 N, 95.003269 W Headwords: Wadena Wadena, MN Wadena County Wadena County, MN